Patent US4785544A successfully refreshed from Google Patents.
US4785544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirit level accessory for the electric drill
Assignee: Individual
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Filing: 1988-02-01
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Granted: 1988-11-22
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Expires: 2008-02-01
Abstract
Abstract A spirit level accessory for an electric drill is provided and consists of a clamp member to fit on mounting surface of the electric drill, a dial member mounted on the clamp member and adjustable to obtain correct position with respect to center line of the electric drill, a bracket member held at any desired angle to the dial member by a spring force, a spirit level member held by the bracket member and a cover member having a mirrored inside surface and hinged on the spirit level member to protect the spirit level member against damage when not in use, allowing the spirit level member to be viewed when fully opened and viewed from the mirrored inside surface when halfway opened.
Inventors
- 👤 Robert Heinsius
- 👤 George Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:45
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; B25H1/0085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
A spirit level accessory for an electric drill which comprises: (a) a clamp member having a gap which fits on standard mounting surface of the electric drill, whereby a clamping force is obtained by deformation of said clamp member nearby the gap; (b) a dial member having four sixty degree graduation scales, said dial member mounted on said clamp member and is adjustable few degrees and set to obtain a correct position with respect to axis of the electric drill; (c) a bracket member having an indicator mark thereon, said bracket member and said dial member held together by a spring force for friction therebetween, whereby the indicator mark of said bracket member can be set at any desired angle shown on said dial member; and (d) a spirit level member held by said bracket member; (e) a cover member having its inside surface highly polished to function as a mirror, said cover member hinged on said spirit level member to protect said spirit level member against damage when not in use, said cover member can be opened fully at ninety degrees allowing said spirit level member to be viewed directly and said cover member can be opened half way at forty five degrees allowing said spirit level member to be viewed indirectly at the inside surface of said cover member.
Claim 2
Dependent Claim
221 words
A spirit level accessory for an electric drill which comprises: (a) a clamp member having a gap which fits on standard mounting surface of the electric drill, whereby a clamping force is obtained by deformation of said clamp member nearby the gap; (b) a dial member having four sixty degree graduation scales, said dial member mounted on said clamp member and is adjustable few degrees and set to obtain a correct position with respect to axis of the electric drill; (c) a bracket member having an indicator mark thereon, said bracket member and said dial member held together by a spring force for friction therebetween, whereby the indicator mark of said bracket member can be set at any desired angle shown on said dial member; and (d) a spirit level member held by said bracket member; (e) a cover member having its inside surface highly polished to function as a mirror, said cover member hinged on said spirit level member to protect said spirit level member against damage when not in use, said cover member can be opened fully at ninety degrees allowing said spirit level member to be viewed directly and said cover member can be opened half way at forty five degrees allowing said spirit level member to be viewed indirectly at the inside surface of said cover member.
Claim 3
Dependent Claim
33 words
A spirit level accessory as recited in claim 1, wherein said spirit level member includes a round type body so that said spirit level member can indicate the horizontal level in all directions.
Claim 4
Dependent Claim
40 words
A spirit level accessory as recited in claim 2, wherein said spirit level member further includes a level liquid holder with top as well as bottom being convex so that said spirit level member can also be used upside down.
Claim 5
Dependent Claim
59 words
A spirit level accessory as recited in claim 3, wherein said cover member is hinged with a pair of stub shafts and adjustment knobs to a U-shaped frame member centrally attached to a ball and socket universal joint in said spirit level memer so that said cover member can be more adjustable with respect to said spirit level member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |